California Smog Check Inspector Exam Prep: 120 Practice MCQs (2023 Edition)

The answers are in bold

 Which of the following is the primary purpose of the California Smog Check program? a) To
increase state revenue through inspection fees. b) To reduce air pollution and improve air
quality. c) To create jobs for automotive technicians. d) To promote the sale of new vehicles.

 Which agency is responsible for overseeing the California Smog Check program? a)
Department of Motor Vehicles (DMV) b) California Air Resources Board (CARB) c) Bureau of
Automotive Repair (BAR) d) Environmental Protection Agency (EPA)

 What is the main component of smog that the Smog Check program aims to reduce? a) Carbon
dioxide (CO2) b) Water vapor (H2O) c) Nitrogen oxides (NOx) d) Sulfur dioxide (SO2)

 Which type of vehicle is EXEMPT from the biennial Smog Check inspection requirement in
California? a) Gasoline-powered vehicles that are less than 8 model years old. b) Diesel-
powered vehicles that are less than 6 model years old. c) Hybrid vehicles that are less than 4
model years old. d) Electric vehicles.

 Which of the following is NOT a valid reason for a vehicle to fail a Smog Check inspection? a)
A malfunctioning catalytic converter b) Excessive hydrocarbon emissions c) Worn-out tires d)
A faulty evaporative emissions control system

 What is the purpose of the "OBDII plug-in" portion of the Smog Check inspection? a) To check
the vehicle's tire pressure. b) To measure the vehicle's fuel economy. c) To retrieve diagnostic
trouble codes from the vehicle's onboard computer. d) To test the vehicle's battery health.

 What is the name of the test used to measure the opacity of diesel vehicle exhaust? a) ASM
(Acceleration Simulation Mode) Test b) TSI (Two-Speed Idle) Test c) Opacity Test d)
Functional Test

 Which of the following is NOT a type of Smog Check station license in California? a) Test-
Only station b) Test-and-Repair station c) Inspection-Only station d) Gold Shield station

 What is the maximum amount a consumer can be charged for a Smog Check inspection in
California? a) $20 b) $30 c) $40 d) $50

 What is the purpose of the "STAR" program in the California Smog Check program? a) To
identify and recognize high-performing Smog Check stations. b) To provide financial incentives
to vehicle owners who repair their vehicles to meet emissions standards. c) To train and certify
Smog Check technicians. d) To develop new emissions control technologies.

 What is the main function of a vehicle's catalytic converter? a) To reduce fuel consumption b)
To convert harmful exhaust gases into less harmful emissions c) To improve engine
performance d) To increase vehicle horsepower

,  Which of the following is NOT a component of a vehicle's evaporative emissions control
system? a) Charcoal canister b) Purge valve c) Fuel injector d) Fuel tank pressure sensor

 What is the purpose of the "visual inspection" portion of the Smog Check inspection? a) To
check the vehicle's tire tread depth b) To assess the condition of the vehicle's interior c) To
identify any obvious emissions-related problems, such as missing or damaged components
d) To verify the vehicle's registration and insurance information

 What is the name of the test used to measure a gasoline vehicle's emissions at idle and under
load? a) ASM (Acceleration Simulation Mode) Test b) TSI (Two-Speed Idle) Test c) Opacity
Test d) Functional Test

 Which of the following is NOT a responsibility of a Smog Check inspector? a) Performing the
required inspections and tests b) Repairing emissions-related problems c) Issuing certificates
of compliance or non-compliance d) Maintaining accurate records of inspections

 What is the consequence of a vehicle failing a Smog Check inspection? a) The vehicle's
registration will be immediately suspended. b) The vehicle owner will be fined. c) The vehicle
owner will need to have the emissions-related problems repaired and re-inspected. d) The
vehicle will be impounded.

 What is the purpose of the "functional inspection" portion of the Smog Check inspection? a) To
check the vehicle's tire pressure. b) To verify that all emissions-related components are
present and functioning properly. c) To measure the vehicle's fuel economy. d) To test the
vehicle's battery health.

 Which of the following is a benefit of the California Smog Check program? a) Reduced air
pollution and improved public health b) Increased vehicle fuel efficiency c) Extended vehicle
lifespan d) All of the above

 What is the main function of a vehicle's EGR (Exhaust Gas Recirculation) system? a) To reduce
fuel consumption b) To convert harmful exhaust gases into less harmful emissions c) To reduce
NOx (nitrogen oxide) emissions by recirculating a portion of exhaust gas back into the
engine d) To increase vehicle horsepower

 Which type of Smog Check station is authorized to perform both inspections and repairs on
vehicles? a) Test-Only station b) Test-and-Repair station c) Inspection-Only station d) Gold
Shield station

 Which of the following is NOT a type of Smog Check certificate in California? a) Certificate of
Compliance b) Certificate of Inspection c) Certificate of Non-Compliance d) Abatement Fee
Certificate

 What is the grace period for getting a Smog Check after the registration renewal date? a) 30
days b) 60 days c) 90 days d) 120 days